Tapping Spout: Diameter 150-300 mm, Length 1-3 m

Component Specifications

Definition

The Tapping Spout is a critical refractory-lined component located at the bottom or side of a Basic Oxygen Furnace (BOF) vessel, designed to facilitate the controlled discharge of molten steel after the oxygen blowing process. It ensures precise flow direction into ladles while preventing slag carryover and maintaining metallurgical quality.

Working Principle

Operates by opening a refractory gate or tilting the BOF vessel to allow molten steel to flow through the spout's tapered, lined channel, utilizing gravity and controlled pressure to direct the stream into receiving ladles, with mechanisms to separate slag from steel.

Materials

High-alumina or magnesia-carbon refractories, often with zirconia additives for thermal shock resistance and erosion protection; steel casing for structural support.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Length	1-3 m
Diameter	150-300 mm
Flow Rate	50-150 tons/min
Refractory Thickness	200-400 mm
Operating Temperature	1600-1700°C

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO 13579, DIN 51060

Parent Products

This component is used in the following industrial products

Basic Oxygen Furnace Vessel

The main reaction vessel in a Basic Oxygen Furnace (BOF) where molten iron is converted into steel through oxygen blowing.

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Electric Arc Furnace

An electric arc furnace melts scrap steel or direct reduced iron using high-power electric arcs to produce liquid steel.

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Engineering Analysis

Risks & Mitigation

Refractory erosion leading to leaks
Slag carryover contaminating steel
Thermal shock causing spout failure
Misalignment causing spillage

FMEA Triads

Trigger: Refractory degradation due to high temperatures and chemical erosion
Failure: Spout blockage or uncontrolled steel flow
Mitigation: Regular inspection, use of advanced refractories, and predictive maintenance schedules

Trigger: Mechanical stress from vessel tilting
Failure: Cracking or detachment of spout lining
Mitigation: Robust casing design and alignment checks

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

±5 mm for diameter, ±10 mm for alignment

Test Method

Thermal cycling tests, non-destructive testing (NDT) for cracks, flow simulation analysis

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Tapping Spout

1 company lists this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.

CHNZBTECH

Xian, Shaanxi, CN

Also makes: Electroslag Remelting Furnace, Continuous Casting Machine, Electric Arc Furnace and 9 more

Listed on the company's own website · profile compiled by CNFX from public sources

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Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

Related Components

Work Rolls

Work rolls are precision cylindrical components in heavy-duty rolling mills that directly contact and deform metal during rolling operations.

Venting Channels

Venting channels are precision-engineered passages in metal casting mold cores designed to allow gases to escape during the molten metal pouring process, preventing defects and ensuring high-quality castings.

Aluminum Matrix

Aluminum matrix is the continuous metallic phase in aluminum matrix composites, providing structural integrity and thermal/electrical conductivity in hot-forged aluminum alloy billets.

Grain Structure

The crystalline arrangement of atoms in hot-forged aluminum alloy billets, determining mechanical properties and performance.

Frequently Asked Questions

What is the primary function of a Tapping Spout in a BOF?

To enable controlled, efficient tapping of molten steel from the furnace into ladles while minimizing slag inclusion and ensuring safety.

How often does a Tapping Spout require maintenance?

Typically after 200-500 heats, depending on refractory wear, operating conditions, and steel grade produced.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Tapping Spout